Display screen or portion thereof with a graphical user interface



The patent or application file contains at least one drawing executed in color. Copies of this patent or patent application publication with color drawing(s) will be provided by the Office upon request and payment of the necessary fee.

FIG. 1 is a front view of a display screen or portion thereof with a graphical user interface showing our new design;

FIG. 2 is a second embodiment thereof; and,

FIG. 3 is a third embodiment thereof.

The uneven broken lines show a display screen or a portion thereof that forms no part of the claimed design. The remaining uniform broken lines show portions of the graphical user interface that form no part of the claimed design. 

CLAIM The ornamental design for a display screen or portion thereof with a graphical user interface, as shown and described. 